121012125 has 64 divisors (see below), whose sum is σ = 219867648. Its totient is φ = 58752000.

The previous prime is 121012123. The next prime is 121012139. The reversal of 121012125 is 521210121.

It is not a de Polignac number, because 121012125 - 2¹ = 121012123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 502005 + ... + 502245.

It is an arithmetic number, because the mean of its divisors is an integer number (3435432).

Almost surely, 2^121012125 is an apocalyptic number.

121012125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121012125 is a deficient number, since it is larger than the sum of its proper divisors (98855523).

121012125 is a wasteful number, since it uses less digits than its factorization.

121012125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 121012125 is about 11000.5511225575. The cubic root of 121012125 is about 494.6252647952.

Adding to 121012125 its reverse (521210121), we get a palindrome (642222246).

The spelling of 121012125 in words is "one hundred twenty-one million, twelve thousand, one hundred twenty-five".